Update Safari data for NavigationActivation API

This PR updates and corrects version values for Safari (Desktop and iOS/iPadOS) for the `NavigationActivation` API. The data comes from the [mdn-bcd-collector](https://mdn-bcd-collector.gooborg.com) project (v10.12.7).

_Check out the [collector's guide on how to review this PR](https://github.com/openwebdocs/mdn-bcd-collector#reviewing-bcd-changes)._

Tests Used: https://mdn-bcd-collector.gooborg.com/tests/api/NavigationActivation

api/NavigationActivation.json

@@ -25,7 +25,7 @@
           "opera": "mirror",
           "opera_android": "mirror",
           "safari": {
-            "version_added": false,
+            "version_added": "18",
             "impl_url": "https://webkit.org/b/258384"
           },
           "safari_ios": "mirror",
@@ -34,7 +34,7 @@
           "webview_ios": "mirror"
         },
         "status": {
-          "experimental": true,
+          "experimental": false,
           "standard_track": true,
           "deprecated": false
         }
@@ -63,15 +63,15 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": false
+              "version_added": "18"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": "mirror",
             "webview_ios": "mirror"
           },
           "status": {
-            "experimental": true,
+            "experimental": false,
             "standard_track": true,
             "deprecated": false
           }
@@ -101,15 +101,15 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": false
+              "version_added": "18"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": "mirror",
             "webview_ios": "mirror"
           },
           "status": {
-            "experimental": true,
+            "experimental": false,
             "standard_track": true,
             "deprecated": false
           }
@@ -139,15 +139,15 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": false
+              "version_added": "18"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": "mirror",
             "webview_ios": "mirror"
           },
           "status": {
-            "experimental": true,
+            "experimental": false,
             "standard_track": true,
             "deprecated": false
           }